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Reaction of N 2 O 5 with H 2 O on bulk liquids and on particles and the effect of dissolved HNO 3
Author(s) -
Hanson D. R.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl00917
Subject(s) - aerosol , analytical chemistry (journal) , reaction rate constant , stratosphere , materials science , hydrolysis , chemistry , kinetics , physics , environmental chemistry , meteorology , organic chemistry , quantum mechanics
Measurements of the reaction probability (γ) of N 2 O 5 on ∼60 wt% H 2 SO 4 were performed at 201 to 230 K on bulk liquids and at 230 K on aerosol particles. The bulk and aerosol results are in good agreement (less than 10% difference). The measurements on bulk liquids show very little change in γ with temperature from 201 to 230 K. HNO 3 was added to the bulk liquids at ∼201 K and to aerosol particles at 230 K (the H 2 SO 4 ‐content was decreased to keep water activity approximately constant). For [HNO 3 ] levels of 1‐to‐15 wt %, the N 2 O 5 reaction probability decreased by ∼15% from that measured on HNO 3 ‐free 60 wt% H 2 SO 4 . For 60 wt% H 2 SO 4 aerosol in the stratosphere ([HNO 3 ] ∼0.3 wt%) the decrease in the N 2 O 5 hydrolysis reaction probability due to HNO 3 would be small.